How do you install flex duct under a house?

Table of Contents

1. Introduction
2. Prerequisites
3. Installation Steps
4. Subo Company Solutions
5. Numerical Analysis
6. References

Introduction

Installing flex duct under a house is a critical task for ensuring efficient heating and cooling distribution. This article provides a detailed guide on installing flex ductwork safely and effectively beneath a house. Proper installation prevents energy loss and ensures comfortable indoor conditions.

Prerequisites

Before beginning the installation, ensure you have the following:

• Flexible ducting (measure to determine the required length).
• Insulation material with appropriate R-value.
• Duct tape and zip ties.
• Metal strapping or support channels for securing ducts.
• Safety gear, including gloves and eye protection.
• Measuring tape and cutting tool.

Installation Steps

Step 1: Planning and Measurement

Begin by planning the duct route. The path should avoid water pipes and electrical wiring while minimizing sharp turns to reduce air resistance. Measure the total length required, adding 10% for adjustments and bends.

Step 2: Cutting the Duct

Using a sharp tool, cut the flex duct to the measured length. Ensure cuts are straight to prevent leaks.

Step 3: Securing the Duct

Secure the duct using metal strapping or support channels every 4 to 6 feet. This prevents sagging and maintains efficient airflow.

Step 4: Sealing and Insulating

Seal all joints with duct tape. Wrap the duct with insulation, ensuring no gaps exist. The insulation's R-value should meet local building codes to ensure energy efficiency.

Step 5: Final Checks

Check for any loose connections or sharp bends. Ensure the duct is not touching the ground to prevent moisture damage.

Subo Company Solutions

Subo Company offers a range of products and services for duct installation:

• Customizable flex ducts with reinforced linings for durability.
• Ecological insulation materials with superior thermal performance.
• Professional installation services that comply with industry standards.
• Advanced duct sealing solutions reducing energy loss by up to 30%.

Numerical Analysis

Proper flex duct installation under a house can significantly reduce energy loss. According to the Department of Energy, uninsulated or poorly installed ducts contribute to a 20% increase in heating and cooling costs.

Analysis Parameters:

• Energy Savings: Insulated ducts can achieve up to 15% improvement in energy efficiency.
• Airflow Efficiency: Minimizing bends improves airflow efficiency by approximately 10%.
• R-value Considerations: Insulation with an R-value of 6 is recommended for optimal thermal performance.

References

• The Department of Energy. Duct Systems. www.energy.gov.
• Subo Company Product Catalog. Flex Duct Solutions. Subo Publications.
• Smith, J. Optimal HVAC Duct Design. HVAC Journal. 2020.